Investigation on Dustfall and Rainfall to Cover Transmittance of Flat-Plate Solar Collectors in Beijing
Abstract
Nature dustfall influences on transmittance of flat-plate solar collectors cover and will furtherly influences on its working efficiency. A 12-month experiment of dustfall and cover transmittance has been conducted in Beijing. A dust deposition model describing the effect of rain on dust deposition has been studied. And the correlation of environmental factors, such as dustfall and rainfall, on cover transmittance has also been established. The maximum relative deviation between calculated and experiment transmittance is 6.42%. Therefore, the correlation is accurate enough and can be used for further analysis such as maintenance strategy of solar thermal system operating in Beijing or other areas with similar climate.